Gun-sight mounting



April 29, 1930. R. NOSKE GUN SQIGHVT MOUNTING Filed Sept. 19, 1927 INVEN TOR RuDoLF NOSK E.

BY Q24 7 ATTY Patented Apr. 29, 1930 TENT; OFFICE RUDOLF NOSKE, OF SAN FRANCISCO, CALIFORNIA GUN-SIGHT MOUNTING Application filed September 19, 1927. Serial No. 220,455

My invention relates to improvements in mountings for telescope gunsights and the like for firearms. i

The present invention is an improvement upon m former invention as. disclosed in Letters atent #1,428,655, granted to me September 12, 1922, and consists in an improved construction and arrangement of parts.

The primary object of the present invention is to provide a gunsight mounting of improved construction.

Another object is to provide an improved 'mounting which will facilitate the adjustment of the sight.

A further object is to provide an improved construction affording increased strength and rigidity and which will more efiiciently hold the sight against displacement due to recoil and other causes.

Another object is to provide an improved device of the character disclosed which will facilitate the construction and assembling of the mounting and which will be more l 95 simple and etfi'cient in operation.

I accomplish these and other objects by means of the improved device disclosed in the drawings forming a part of the present application wherein like characters of reference '3 are used to designate similar parts throughout the specification and drawings, and in which, i

Fig. 1 is a side elevation of my improved gunsight mounting;

Fig.2 is a plan view of the mounting, the gunsight being omitted from the drawing;

' Fig. 3 is a transverse section taken upon the line 3--3 of Fig. 2 in the direction indicated, the figure being drawn upon a larger scale;

Fig. 4. is a broken transverse, sectional detail showing the construction and arrangement of the adjusting screw, the section being taken upon the line 4-4 of Fig. 2 in the 4 5 direction indicated;

Fig. 5 is a broken longitudinal section taken upon the line 55 of Fig. 2 in the direction indicated.

Referring to the drawings, the numeral 1 is used to designate a fixed plate having holes 2 and 3 arranged to receive suitable screws and pins respectively, not shown, whereby the plate may be rigidly secured upon the breech of a rifle, not shown.

The upper edge of the plate 1 isprovided with a dovetail 1 arranged to engage a dovetail groove 6 formed in the lower surface of a mounting plate 7. The plate 7 is rigidly looked upon the plate 1 by means of a screw actuated tapered pin 5 as in my former patent above referred to.

The mounting plate 7 is provided with a pivot pin 8 positioned near the forward end thereof. Lugs 9 and 11 are formed upon the forward and rearward ends of the plate 7, said lugs having undercut recesses 12 and 18 respectively formed therein. The rearward end of the plate 7 is split as atl4 for a v purpose hereinafter more fully described.

split as at 23 adjacent the juncture of the extension with the body of the member 16. The split 23 is preferably arranged'radially with respect to the ring portion of the clamp extensions and the base of each extension is made relatively heavy to receive a single clamping screw 24 inserted through an opening 25 in the upper split half of the extension and threaded into the lower base portion whereby the ring may be contracted to rigidly clamp the telescope gunsight 22. j j

The member 16 is arranged to be pivotally movable upon the pivot pin 8 and is arranged to be pivotally adjusted relative to the plate '7 by means of an adjusting screw 26 threaded into the split rearward end of said plate 7. The screw is provided with a calibrated head 27 receivable into a recess 28 formed in the adjacent side of the plate 7 and arranged to engage the adjacent edge o'f'the member 16.

by the calibrated head asbefore.

A collar 29 is threaded onto the opposite end of the screw 26, said collar being arranged to be screwed into tight frictional engagement with the adjacent edge of the member 16 opposite the head 27. The collar is arranged to be received within a recess 31 formed in the adjacent. side of the plate 7. The collar is rigidly secured upon the screw'26 by means of an expanding screw 32 tapped into the end of the screw 26 and provided with an inwardly beveled head 33 arranged'to expand theend of the screw 26, said screw being split atits end as at 34: to permit said expansion. After threading the adjusting screw 26 through the split end of the plate 7', the split ends are compressedslightly together by meansv ot-a screw 35 whereby pressure-is exerted in opposite directions by said split portions to take up any backlash from the screw when turned in either direction.

In operation, the fixed plate 1 is rigidly screwed and pinned uponthe breech of a rifle. and the mounting plate applied and rigidly secured in engagement with the dovetail 4. The sight mounting member is applied by moving the reeess17-onto the pinv 8, the member 16being applied-first at substantially right anglesto the plate 7 and thereafter turned upon the pivotpin 8 to move the flanges 18 and 19 into locking engagement with the-recesses 12 and 13 to loch-the member 16 against upwardor longitudinal movement. The adjusting screw 26 is. applied after the member 16 has been swung into .alinement with the plate 7 the screw being threaded intothe split ends of the plate 7fas abovedescribed until the calibrated head 27 exerts a firm frictional pressure against the adjacent side oft-he plate 7 The collar 29 is then applied to exert a frictional pressure against the opposite side of the member 16 and rigidly lockedbythe screw 32. The gunsight 22 is then inserted and securedby the clamping member 16.

In adjusting the sight pivotally upon the plate 7, the adjusting screw is turned by means of the;head27 to advance or recede-the screw within-the plate 7 asdesired'. In ad vancing the screw 26, the head 27, engaging theside of themember 16, causessaid member 16; to be pivotally displaced, the degree of displacement being indicated byr-the number of calibrations upon the head 27 through which the. head is turned. The calibrations are arranged to indicate a prescribed dis? placement fixed range. When thescrew is'receded' the collar- 29? operates toswing the member 16' in; the corresponding direction, the degree-of movement being. indicated sureextertediin both; directions by the spilt ends of the plate: 7 operates to take up: all backlash so that there is no: lost. motion throughthe threads; when the screwis turned in either direction. This point ishighlyim- The pres- 7 portant to obtain an accurate adjustment of the sight, and to vary the adjustment as required, by means of a single adjusting screw.

lVhile I have illustrated and described the preferred embodiment of my improved construction, the device is of course subject to modification in numerous details without departing from the spirit of the invention. I therefore do not wish to restrict myself to the specific details of construction illustrated and described, but desire to avail myself of all modifications which may fall within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A gun sight mounting comprising a fixed plate arranged to be rigidly secured upon the breech of a rifie; a mounting plate arranged to be rigidly secured upon the fixed plate; a sight mounting member pivotally mounted uponthe mountingplate; an adjusting screw threaded into mounting-plate and engaging the sight mounting member; a retaining collar mounted-upon, the screw and engaging the sight mounting member; and means for rigidly securing the collar upon thescrew in frictionalengagement with the sight mounting member for moving said member when the screw is turned.

2, A gun sight mounting comprising a fixed plate arranged to be rigidly secured upon the breech of a rifle; amounting plate arranged to be rigidly securedupon the fixed plate; a sight mounting member pivotally mounted upon the mounting plate; an adjusting screw threaded. into the mounting plateand provided with a head engaging-one side of the sightmounting member; a collar threaded onto the screw upon the end oppo-' site the head and engaging the opposite side of the sight mounting member ;;and means for rigidl securing the collar upon the screw in frictional engagement with the sight mounting member whereby rotation of the screw in either direction will. impart corresponding movement to said member.

3. A gunsightmounting comprising a fixed plate arranged to be rigidly secured upon the breech of a rifie; a mounting plate arranged to-be rigidly secured upon the fixed plate a pivot pin formed upon the forward end? of the mounting plate; a lug formed upon the mounting plate forwardly of the pin, said lug having an undercut recess facing saidpin a sight mounting member having-arecessarrangedto receive the pin and provided with a forwardly disposed fiange arranged to bemoved into locking engagement with the undercut recess an adjusting screw threaded into theinounting plate; and means carried by said screw and engaging opposite sides of the sight mounting member for pivotally adjusting said member; relative to the mounting plate.

4:. A gunsight mounting comprising a fixed plate arranged to be rigidly secured upon the breech of a rifle; a mounting plate arranged to be rigidly secured upon the fixed plate; a

pivot pin formed upon the forward end of the mounting plate; a lug formed upon the mounting plate forwardly of the pin, said lug having an undercut recess facing the pin; a sight mounting member having a recess arranged to receive the pin and provided with a forwardly disposed flange arranged to be moved into locking engagement with the undercut recess; an adjusting screw threaded into the mounting plate; a head formed upon one end of the screw to engage one side of the sight mounting member; a collar threaded onto the opposite end of the screw; and means for rigidly securing the collar in frictional engagement with the opposite side of the mounting member.

5. A gunsight mounting comprising a fixed plate arranged to be rigidly secured upon the breech of a rifle; a mounting plate arranged to be rigidly secured, upon the fixed plate,

said mounting plate having a slit formed at one end thereof; a sight mounting member pivotally mounted upon the mounting plate; an adjusting screw threaded through the split portion of the mounting plate, said split portion being arranged to take up back lash to prevent lost motion when the screw is turned in either direction; and means carried by the screw and engaging opposite sides of the sight mounting member for pivotally moving said member relative to the mounting plate.

6. A gunsight mounting comprising a mounting plate arranged to be rigidly secured upon the breech of a rifle and having a split end; a sight mounting member pivotally mounted upon the mounting plate; a single adjusting screw threaded through the split end portions of the mounting plate;

and means carried by said screw for pivotally adjusting the mounting member in either direction relatively to the mounting plate; and means compressing the split end portions of the plate toward each other and against opposite sides of the threads of the screw to take up back lash from the screw and to prevent lost motion when the screw is turned in either direction.

In witness whereof, I hereunto set my sign ature.

RUDOLF NOSKE. 

